[Ruptured Non-dissecting Thoracic Aortic Aneurysm].

Although the operative results for non-dissecting thoracic aneurysm has been improving markedly, that of the ruptured one is still poor. Once aneurysmal rupture is occurred, a patient can almost never survive. Only few patients could arrive to an emergency hospital. It is reported that about 60% of the patients are died suddenly and the remaining 40% of the patients may undergo surgery or endovascular intervention. In the annual report in 2012 published by "Journal of General Thoracic and Cardiovascular Surgery", the mortality rates during postoperative 30 days of the non-ruptured and the ruptured nondissecting thoracic aneurysm are 2.71% and 19.0% respectively. Thoracic endovascular aortic repair (TEVAR) is predominant alternatives for the patients with poor hemodynamic condition by rupture of aortic aneurysm. The mortality rate after TEVAR for ruptured thoracic aneurysm is reported to be 10.87%, and is lower than that of the open surgery. It is essential for preventing the death by aneurysmal rupture that the open surgery or TEVAR for thoracic aortic aneurysm should be carried out electively.